Nearly three dozen journalists at a broad range of major publications have been targeted by a far-right group that maintains a Deep Web database listing the personal information of people who threaten their views. This group specializes in encouraging others to harass those targeted by their ire, and has claimed responsibility for dozens of bomb threats and “swatting” incidents, where police are tricked into visiting potentially deadly force on the target’s address. At issue is a site called the “Doxbin,” which hosts the names, addresses, phone number and often known IP addresses, Social Security numbers, dates of birth and other...